diff --git a/requirements.txt b/requirements.txt
index fe3a177..44eb972 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ click==6.7
 colorama==0.2.5
 decorator==4.1.2
 gunicorn==19.7.1
-html5lib==0.999
+html5lib==0.999999999
 icdiff==1.9.1
 itsdangerous==0.24
 jsbeautifier==1.6.14